b Metamorphosis. Actinotrocha spec. (Phoronidea) 



SIGNORET, J. Dr.es Sci., Prof. - Lab. d'Embryol., Unite de Sci., Univ. de Caen, 14032 CAEN, 



France ISDB 



a Study of nuclear differentiation and specific activities by means of nuclear transplantation. 



Ambystoma mexicanum (Urodela) 

 b La cinetique cellulaire au cours de la segmentation; modalites, determinisme, signification. 



Ambystoma mexicanum (Urodela) 

 SIGOT, M. Dr.es Sci. - Inst. d'Embryol. et Teratol. Exper. du C.N.R.S., 49bis Av. de la Belle 



GabrieUe, 94130 NOGENT-sur-MARNE, France # ISDB 



a Morphogenese du tube digestif en culture in vitro, specialement ultrastructure et enzymologie de 



1'estomac. Gallus spec. (Aves) (avec M. F. SIGOT) 

 b Stimulation de la differentiation glandulaire in vitro. Gallus spec. (Aves) 

 c Histoimmunologie de 1'estomac embryonnaire. Gallus spec. (Aves) 

 SIGOT (LUIZARD), Mrs. M. F. Lic.es Sci. - Inst. d'Embryol. et Teratol. Exper. du C.N.R.S., 49bis 



Av. de la Belle GabrieUe, 94130 NOGENT-sur-MARNE, France 

 a Cancerogenese chimique du foie, etudiee en culture organotypique. Rattus norvegicus (Rodentia) 

 b Ultrastructure et enzymologie de 1'estomac de l'embryon. Gallus gallus (Aves) (avec M. SIGOT) 

 SILEN, L. K. P. Fil.Dr., Prof. - Zool. Inst., Univ. of Stockholm, Radmansgatan 70 A, Box 6801, 



S-113 86 STOCKHOLM, Sweden 



no embryological work in progress 

 SIMKISS, K. Ph.D., Prof. - Dept. of Zool., Univ. of Reading, READING RG6 2AJ, England 

 a Calcium pumps in the chorioallantoic membrane and their role in transporting ions from eggshell 



to embryo. Gallus domesticus (Aves) 

 b Electrolyte movements from chorion and from allantoic fluid to blood. Gallus domesticus (Aves) 

 SIMPSON, Mrs. P. B.Sc.(Hons.) - Inst. d'Embryol. et Teratol. Exper. du C.N.R.S., 49bis Av. de la 



Belle GabrieUe, 94130 NOGENT-sur-MARNE, France 

 a Transdetermination in imaginal discs after long-term culture in vivo. Drosophila melanogaster 



(Diptera) 

 b Protein patterns in imaginal discs. Drosophila melanogaster (Diptera) (with E. J. C. SMITH) 

 SINITSINA, Miss V. F. - Lab. of Developm. Cytogenet., Inst, of Developm. Biol., Acad, of Sci. of the 



USSR, Vavilov St. 26, MOSCOW 117334, U.S.S.R. 

 a DNA synthesis and cell cycles during eye development, especially development of regional 



differences in neural retina and pigment epithelium. Acipenser stellatus, A. giildenstadti 



(Chondrostei) (with O. G. STROEVA, V. I. MITASHOV, and E. A. BABURINA) 

 SISTO DANEO, Miss L. - Dept. of Human Anat., Univ. of Torino, Corso M.D'Azeglio 52, 10126 



TORINO, Italy 

 a Electron microscopy of the partially deafferentiated embryonic optic tectum. Gallus domesticus 



(Aves) 

 b Precocious neuromuscular functions in the embryo (electron microscopy). Gallus domesticus 



(Aves) 

 SKATKOV, M. E. Cand.med.sci. - Lab. of Cytol., Inst, of Med. Genet., Acad, of Med. Sci. of the 



USSR, Kashirskoe Shosse 6/ A, MOSCOW 115478, U.S.S.R. 

 a Ultrastructure of oogonia and oocytes. Homo sapiens (Primates) 

 SKOBLINA, M. N. - Inst, of Developm. Biol., Acad, of Sci. of the USSR, Vavilov St. 26, MOSCOW 



117334, U.S.S.R. 

 a Effect of gonadotropins and changes in the germinal vesicle and in the oocyte cytoplasm during 



maturation. (Acipenseridae, Chondrostei; Amphibia) (with T. A. DETTLAFF and T. B. AISEN- 



STADT) 

 b Role of karyoplasm in the formation of the mature egg properties. Acipenser stellatus 



(Chondrostei), Misgurnus fossilis (Teleostei), Rana temporaria, Bufo spec. (Anura) 

 c Mechanism of action of gonadotropic hormones. Same species as b 

 SKREB, N. M.D., D.Sc, Prof. - Inst, of Biol., Fac. of Med., Univ. of Zagreb, Salata 3, P.O.Box 166, 



41001 ZAGREB, Yugoslavia ISDB 



a Early differentiation; transplantation, in vitro culture, autoradiography. Rattus norvegicus 



(Rodentia) (with B. LEVAK, Lj. HOFMAN and A. SVAJGER, Inst, of Histol. and Embryol.) 

 b Analysis of soluble proteins in organogenesis. Same species as a (with D. SERMAN) 

 c Differentiation of early postimplantation stages under the kidney capsule, teratocarcinogenesis, 



nature of embryonal carcinoma cells; transplantation, electron microscopy. Mus musculus 



(Rodentia) (with D. SOLTER and I. DAMJANOV) 

 d Developmental capacities of tissues of the chorioallantoic membrane. Gallus domesticus (Aves) 



(with B. LEVAK and A. SVAJGER) 

 SLABY\ O. D.Sc, Prof. - Inst, of Histol. and Embryol., Charles Univ., Karlovarska 48, PLZEN, 



Czechoslovakia ISDB 



- temporarily: Cite Jean de la Fontaine, La Tour, ORAN, Algeria 



(no embryological work in progress) 

 SLACK, Mrs. C. Dr.Sc, Ph.D. - Dept. of Physiol., Royal Free Hosp. Med. School, LONDON W.l, 



England 

 SLADECEK, F. RNDr., DSc, Prof. - Dept. of Exp. Zool., Charles Univ., Vinicna 7, 12844 PRAHA 



2, Czechoslovakia ISDB 



a Transplantation of nuclei in relation to the development of antigenic characteristics. (Amphibia) 



(with A. ROMANOVSKY) 

 b Transplantation of nuclei in relation to nucleic acids. (Amphibia) (with J. NEDVIDEK) 

 c Number of cell generations in relation to cell determination. (Amphibia) 

 SLAMA, K. RNDr., CSc. - Dept. of Physiol., Inst, of Entomol., Czech. Acad, of Sci., Na Folimance 



91 



